I had a lactation consultant come to visit last week - things had been going well, but I was quite sore, so I thought it couldn't hurt. I was in the middle of breakfast when she arrived, which was whole wheat potato bread toast with peanut butter.
She immediately told me to lay off the peanuts because of the possibility of peanut allergies. I haven't been able to find much in the medical literature about it, just one article in NEJM that says that peanut consumption by the mother is not related to allergies, but I wonder if I should stay away from them anyway. Then there's always the flip side, I keep hearing now about how people are getting more allergies because they're NOT exposed to allergens when they're young because we keep everything so clean now. What would you do?
BTW, that same article says that peanut allergies are related to exposure to soy milk, eczema (on the baby), and with the use of lotions or creams containing peanut oil on the baby's skin (although not on the mother's breast). The association with soy milk is likely because peanuts and soy are in fact in the same family, and some of the pieces of protein that are the peanut allergens are also found in soy proteins.